Prostate CancerPhase 2/3PSMAcTIONNCT06780670
Open-label Study Comparing AAA817 Versus Standard of Care in the Treatment of Previously Treated PSMA-positive mCRPC Adults Who Have Disease Progressed on or After [177Lu]Lu-PSMA Targeted Therapy
A Phase 2/3 study testing Investigators choice of SoC and AAA817 in people with Prostate Cancer, run by Novartis Pharmaceuticals at 93 sites in 13 countries.
Trial summary
This is a Phase II/III study. Patient population is adult participants with PSMA-positive mCRPC who had treatments with androgen receptor pathway inhibitor (ARPI) and taxane-based chemotherapy and progressed on or after [177Lu]Lu-PSMA targeted therapy. Read more about this study
- Who is it for?
- Ages 18 to 100 years, men only
- Conditions the study is for
- Prostate Cancer
- What is being tested?
- Investigators choice of SoC and AAA817
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 443 participants
- Where
- 93 sitesin 13 countries
- Study dates
- 27 Feb 2025to 19 Jul 2033
- Phase
- Phase 2/3
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 100 years
- Men only
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- adults ≥ 18 years of age.
- ECOG performance status of 0 to 2.
- histopathological and/or cytological confirmation of adenocarcinoma of the prostate.
- PSMA-positive disease as assessed by PSMA PET/CT scan using an approved PSMA imaging agent as protocol instructed,
- castrate level of serum/plasma testosterone (< 50 ng/dL or < 1.7 nmol/L).
- Prior treatments with an androgen receptor pathway inhibitor (ARPI) and taxane-based chemotherapy, and progressed on or after [177Lu]Lu-PSMA targeted therapy.
- ≥ 1 metastatic lesion that is present on screening/baseline CT, MRI, or bone scan imaging obtained ≤ 28 days prior to randomization
- eGFR as requested by the sponsor
Who cannot join
- Any investigational agents within 28 days prior to the day of randomization.
- Any 225Ac-based investigational compound used prior to the day of randomization.
- Participants with a history of CNS metastases who are neurologically unstable, symptomatic, or receiving corticosteroids for the purpose of maintaining neurologic integrity.
- Concurrent acute kidney injury (renal failure developed between 48 hours to 7 days) or chronic kidney disease (at least 3 months of ongoing renal injury)
- Baseline xerostomia ≥ Grade 2 by CTCAE v.5
- History of uncontrolled hypertension, myocardial infarction (MI), angina pectoris, or coronary artery bypass graft (CABG) within 6 months prior to ICF signature and/or clinically active significant cardiac disease
- History of lymphoproliferative disease or any known malignancy or history of malignancy of any organ system within the past 2 years (except for basal cell carcinoma or actinic keratosis that have been treated with no evidence of recurrence in the past 3 months, non-invasive malignant colon polyps that have been removed).
- Other protocol-defined inclusion/exclusion criteria may apply.
Trial locations and contacts
93 sites in 13 countries. Contact the study team or a site near you to ask about taking part.
Novartis Pharmaceuticals contact
93 sites in 13 countries
United States35 sites, 35 recruiting
- Recruiting
University Cancer and Blood Center LLC
Athens, Georgia, 30607
Christen Nicole Cooper Pope, +1 706 353 2990, npope@universitycancer.com
Petros Nikolinakos
- Recruiting
Emory University
Atlanta, Georgia, 30322
Jalpa Patel, +1 404 778 1835, jalpa.r.patel@emory.edu
Shahid Sattar Ahmed
- Recruiting
Dana Farber Cancer Institute
Boston, Massachusetts, 02115
Michael Bonhomme, 617-632-5136, michael_bonhomme@dfci.harvard.edu
Xiao Wei
- Recruiting
Beth Israel Deaconess Medical Center
Boston, Massachusetts, 02215
Ooviya Sathiyamoorthy, 617-643-9923, osathiya@bidmc.harvard.edu
David J Einstein
- Recruiting
University of Chicago
Chicago, Illinois, 60637
Paige Olson, 773-702-4848, paige.olson@bsd.uchicago.edu
Mohammad Atiq
- Recruiting
Texas Oncology
Dallas, Texas, 75251
Marian Heaven, 512-427-9467, marian.heaven@usoncology.com
Michael P Herman
- Recruiting
Rocky Mountain Cancer Centers
Denver, Colorado, 80218
Jannae Foellmer, 303-385-2000, jannae.foellmer@usoncology.com
Manojkumar Bupathi
- Recruiting
Virginia Cancer Specialists
Fairfax, Virginia, 22031
Kristi Ben-Barka, kristi.ben-barka@usoncology.com
Gregory Scott Sibley
- Recruiting
Central Ohio Urology Group
Gahanna, Ohio, 43230
Sarah Faisal, sarah.faisal@us-uro.com
Benjamin Martin
- Recruiting
Hartford Hospital
Hartford, Connecticut, 06102
Melanie Manning, Melanie.Manning@hhchealth.org
Andrew Salner
- Recruiting
Indiana University
Indianapolis, Indiana, 46202
Marie Burton, mariburt@iu.edu
Nabil Adra
- Recruiting
University of Kansas Hospital
Kansas City, Kansas, 66160
Kelsey Schwensen, kschwensen@kumc.edu
Xinglei Shen
- Recruiting
VA Greater LA Healthcare System
Los Angeles, California, 90073
Janake Wijesuriya, janake.wijesuriya@va.gov
Gholam Reza Berenji
- Recruiting
East Jefferson Hospital
Metairie, Louisiana, 70006
Alexandra Lieberman, alexandra.lieberman@lcmchealth.org
Alton Oliver Sartor
- Recruiting
Baptist Health South
Miami, Florida, 33173
Leslie Castaneda, leslie.castaneda@baptisthealth.net
Adeel Kaiser
- Recruiting
Medical College Of Wisconsin
Milwaukee, Wisconsin, 53226
Nadia Thomas, nathomas@mcw.edu
Deepak Kilari
- Recruiting
Utah Intermountain Medical Center
Murray, Utah, 84107
Becky Arroyo, becky.arroyo@imail.org
David Gill
- Recruiting
Carolina Urologic Research Center
Myrtle Beach, South Carolina, 29572
Rebecca Floyd, 843-839-1679, rebecca.floyd@startresearch.com
Neal D Shore
- Recruiting
Mount Sinai Hosp Med School
New York, New York, 10029
Ilda Bander, 212-241-8903, Ilda.Bander@mountsinai.org
Randy Yeh
- Recruiting
Nebraska Cancer Specialists
Omaha, Nebraska, 68154
Marlene Bridwell, 402-334-4773, mbridwell@nebraskacancer.com
Samuel Mehr
- Recruiting
AdventHealth
Orlando, Florida, 32804
Joseph Guzzo, 407-303-3235, joseph.guzzo@adventhealth.com
Ravi Shridhar
- Recruiting
VA Palo Alto Health Care System
Palo Alto, California, 94304-1207
Pallavi Gautam, 650-493-5000, pallavi.gautam@va.gov
Minal Vasanawala
- Recruiting
Stanford University Medical Center
Palo Alto, California, 94304
Mikayla Easterling, maeast@stanford.edu
Hong Song
- Recruiting
Fox Chase Cancer Center
Philadelphia, Pennsylvania, 19111
Candice Schewbel, 215-728-3075, candice.schwebel@fccc.edu
Matthew Zibelman
- Recruiting
Onco Hemato Asso of SW Virginia
Roanoke, Virginia, 24014
Natasha Holt, 540-774-8660, natasha.holt@usoncology.com
David Buck
- Recruiting
Urology San Antonio
San Antonio, Texas, 78229
Sandra Davila, sandra.davila@usa-clinicaltrials.com
Daniel Saltzstein
- Recruiting
Sansum Clinic
Santa Barbara, California, 93105
Jessica Wong, 805-563-5800, jessica.wong2@sutterhealth.org
Gregg Newman
- Recruiting
Saint Johns Cancer Institute
Santa Monica, California, 90404
Joey Dumadag, 310-829-8569, joey.dumadag@providence.org
Przemyslaw Twardowski
- Recruiting
Honor Health Research Institute
Scottsdale, Arizona, 85258
Cierra Spikes, cspikes@honorhealth.com
Michael Gordon
- Recruiting
Fred Hutchinson Cancer Research Center
Seattle, Washington, 98109-1024
Brianna Woo, bwoo@fredhutch.org
Ruben Raychaudhuri
- Recruiting
Oregon Urology Institute
Springfield, Oregon, 97477
Maxim Dimarco, mdimarco@oregonurology.com
Bryan Mehlhaff
- Recruiting
WA Uni School Of Med
St Louis, Missouri, 63110
Collin Welch, 314-454-8293, c.welch@wustl.edu
Jeff Michalski
- Recruiting
Associated Med Professionals of NY
Syracuse, New York, 13210
Nathan Forrest, nathan.forrest@ampofny.com
Steven Finkelstein
- Recruiting
Montefiore Medical Center
The Bronx, New York, 10467
Tahrima Chowdhury, 718-920-6642, tahchowdhu@montefiore.org
Benjamin A Gartrell
- Recruiting
New Jersey Urology LLC
Voorhees Township, New Jersey, 08043
Gabriela Mercado, 856-673-1613, gmercado3@nj-urology.com
Gordon Brown
China16 sites, 16 recruiting
- Recruiting
Novartis Investigative Site
Beijing, 100034
- Recruiting
Novartis Investigative Site
Beijing, 100036
- Recruiting
Novartis Investigative Site
Chengdu, Sichuan, 610041
- Recruiting
Novartis Investigative Site
Fuzhou, Fujian, 350025
- Recruiting
Novartis Investigative Site
Guangzhou, 510060
- Recruiting
Novartis Investigative Site
Nanjing, Jiangsu, 210006
- Recruiting
Novartis Investigative Site
Nanjing, Jiangsu, 210029
- Recruiting
Novartis Investigative Site
Shanghai, 200025
- Recruiting
Novartis Investigative Site
Shanghai, 200032
- Recruiting
Novartis Investigative Site
Shenyang, Liaoning, 110011
- Recruiting
Novartis Investigative Site
Tianjin, 300300
- Recruiting
Novartis Investigative Site
Tianjin, 300480
- Recruiting
Novartis Investigative Site
Wuhan, Hubei, 430022
- Recruiting
Novartis Investigative Site
Wuhan, Hubei, 430030
- Recruiting
Novartis Investigative Site
Xian, Shanxi, 710032
- Recruiting
Novartis Investigative Site
Xian, Shanxi, 710061
Japan11 sites, 11 recruiting
- Recruiting
Novartis Investigative Site
Chiba, 2608717
- Recruiting
Novartis Investigative Site
Fukuoka, 8110213
- Recruiting
Novartis Investigative Site
Fukuoka, 8120033
- Recruiting
Novartis Investigative Site
Fukuoka, 8128582
- Recruiting
Novartis Investigative Site
Fukushima, 9601295
- Recruiting
Novartis Investigative Site
Ishikawa, 9208641
- Recruiting
Novartis Investigative Site
Kashiwa, Chiba, 2778577
- Recruiting
Novartis Investigative Site
Kobe, Hyōgo, 6500047
- Recruiting
Novartis Investigative Site
Kyoto, 6068507
- Recruiting
Novartis Investigative Site
Sapporo, Hokkaido, 0608648
- Recruiting
Novartis Investigative Site
Yokohama, Kanagawa, 2360004
Israel6 sites, 6 recruiting
- Recruiting
Novartis Investigative Site
Beersheba, 8457108
- Recruiting
Novartis Investigative Site
Haifa, 3109601
- Recruiting
Novartis Investigative Site
Jerusalem, 9112001
- Recruiting
Novartis Investigative Site
Petah Tikva, 4941492
- Recruiting
Novartis Investigative Site
Ramat Gan, 5265601
- Recruiting
Novartis Investigative Site
Tel Aviv, 6423906
South Korea4 sites, 4 recruiting
- Recruiting
Novartis Investigative Site
Seoul, 03080
- Recruiting
Novartis Investigative Site
Seoul, 03722
- Recruiting
Novartis Investigative Site
Seoul, 05505
- Recruiting
Novartis Investigative Site
Seoul, 06591
Taiwan4 sites, 4 recruiting
- Recruiting
Novartis Investigative Site
Taipei, 10002
- Recruiting
Novartis Investigative Site
Taipei, 103616
- Recruiting
Novartis Investigative Site
Taipei, 11217
- Recruiting
Novartis Investigative Site
Taoyuan, 33305
Australia3 sites, 3 recruiting
- Recruiting
Novartis Investigative Site
Darlinghurst, New South Wales, 2010
- Recruiting
Novartis Investigative Site
Herston, Queensland, 4029
- Recruiting
Novartis Investigative Site
Melbourne, Victoria, 3004
Malaysia3 sites, 3 recruiting
- Recruiting
Novartis Investigative Site
Petaling Jaya, Selangor, 46050
- Recruiting
Novartis Investigative Site
Petaling Jaya, Selangor, 46150
- Recruiting
Novartis Investigative Site
Putrajaya, Kuala Lumpur, 62250
Singapore3 sites, 3 recruiting
- Recruiting
Novartis Investigative Site
Singapore, 119228
- Recruiting
Novartis Investigative Site
Singapore, 168583
- Recruiting
Novartis Investigative Site
Singapore, 258499
Switzerland3 sites, 3 recruiting
- Recruiting
Novartis Investigative Site
Basel, 4031
- Recruiting
Novartis Investigative Site
Bellinzona, 6500
- Recruiting
Novartis Investigative Site
Bern, 3010
Brazil2 sites, 2 recruiting
- Recruiting
Novartis Investigative Site
São Paulo, São Paulo, 01308-050
- Recruiting
Novartis Investigative Site
São Paulo, São Paulo, 05652-000
Mexico2 sites, 2 recruiting
- Recruiting
Novartis Investigative Site
Huxquilucan, 52763
- Recruiting
Novartis Investigative Site
Mexico City, Mexico City, 14050
Hong Kong1 site, 1 recruiting
- Recruiting
Novartis Investigative Site
Hong Kong, 999077
About this study
Official title: PSMAcTION: A Phase II/III, Open-label, International, Multicenter, Randomized Study of AAA817 Versus Standard of Care in the Treatment of Adult Participants With PSMA Positive Metastatic Castration-resistant Prostate Cancer Who Progressed on or After [177Lu]Lu-PSMA Targeted Therapy
This is a Phase II/III study. Patient population is adult participants with PSMA-positive mCRPC who had treatments with androgen receptor pathway inhibitor (ARPI) and taxane-based chemotherapy and progressed on or after [177Lu]Lu-PSMA targeted therapy.
Treatment of interest: the investigational treatment is AAA817 regardless of subsequent anti-neoplastic treatment. The control treatment is investigator's choice of Standard of Care, regardless of subsequent anti-neoplastic treatment
Read the detailed description
Study CAAA817A12201 consists of 2 parts: a randomized, open-label, international, multicenter, phase II study (Phase II) to collect more information to support the proposed dose of AAA817 and a randomized, open-label, international, multicenter, 2- arm phase III study (Phase III) aimed to evaluate the efficacy and safety of proposed dose of AAA817 vs. investigator's choice of standard of care (SoC) in the treatment of adult participants with PSMA-positive metastatic castration-resistant prostate cancer (mCRPC) who had treatments with ARPI and taxane-based chemotherapy, and progressed on or after [177Lu]Lu-PSMA targeted therapy. The purpose of the phase II part (Phase II) of this study is to collect additional information to support proposed phase III dose of AAA817.
- Conditions
- Prostate Cancer
- Being tested
- Investigators choice of SoC, AAA817
- Keywords
- post [177Lu]Lu-PSMA targeted therapy, PSMA-positive, mCRPC adults, Metastatic castration-resistant prostate cancer, AAA817, [225Ac]Ac-PSMA-617, PSMA-based targeted therapy, Standard of Care, SOC
- Medical subject headings
- Prostatic Neoplasms
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Investigators choice of SoCDrug
The control treatment in Phase III is investigator's choice of SoC
AAA817Drug
Also called [225Ac]Ac-PSMA-617)
The investigational treatment is AAA817
AAA817Drug
Also called [225Ac]Ac-PSMA-617)
The investigational treatment is AAA817
AAA817Drug
Also called [225Ac]Ac-PSMA-617
Investigational treatment is the Dose B of AAA817
| Study group | Role | What they receive |
|---|---|---|
| Phase II: AAA817 Dose B | Experimental | AAA817 will be given for a number of cycles; a cycle = 8 weeks Receives: Drug: AAA817 |
| Phase III: Investigator's choice of SoC | Active comparator | Participants will be given Standard of Care (SOC) treatment per Investigator's choice. Receives: Drug: Investigators choice of SoC |
| Phase II: AAA817 Dose A | Experimental | AAA817 Dose A will be given for a number of cycles: a cycle = 8 weeks Receives: Drug: AAA817 |
| Phase III: Recommended Phase 3 Dose of AAA817 | Experimental | Rp3D of AAA817 will be given for a number of cycles; a cycle = 8 weeks Receives: Drug: AAA817 |
What is being measured
The primary outcome is the main question the study is designed to answer.
Biochemical response rate (Phase II)
Biochemical response rate as defined as the percentage of participants who achieved a ≥ 50% decrease from baseline that is confirmed by a second measurement
Measured: from date of randomization up to approximately 24 months
Adverse Events (AEs) and Serious Adverse Events (SAEs), and deaths - Phase II
Safety defined as the type, incidence and severity of AEs and SAEs, and deaths
Measured: from day of randomization to 30 days after End of Treatment or (last AAA817 dose date + 55 days, last dose date of SoC + 30 days), whichever is later
Tolerability of the proposed dose of AAA817- Phase II
Percentage of participants who experienced Dose interruptions, reductions, discontinuation, dose intensity and duration of exposure
Measured: From on-treatment period which start from the first dose of study treatment until 30 days post-last dose date for SoC and 55 days post last-dose for AAA817
Radiographic progression-free survival (rPFS)- Phase III
Percentage of participants who are alive without radiographic progression or who are lost to follow-up at the time of analysis
Measured: from date of randomization up to approximately 24 months
Overall survival (OS)- Phase III
Percentage of participants who are alive or who are lost to follow-up at the time of analysis
Measured: from date of randomization up to approximately 24 months
Secondary outcomes (14)
Radiographic progression-free survival (rPFS)- Phase II
Percentage of participants who are alive without radiographic progression or who are lost to follow-up at the time of analysis
Measured: from date of randomization up to approximately 24 months
Progression free survival (PFS)- Phase II
Percentage of Participants meeting Progression Free Survival
Measured: from date of randomization up to approximately 24 months
Overall response rate (ORR)- Phase II
Percentage of participants with best overall response (BOR) of complete response (CR) or partial response (PR)
Measured: from date of randomization up to approximately 24 months
Disease control rate (DCR)- Phase II
Percentage of participants with BOR of CR, PR, stable disease (SD) or non-CR/non-PD
Measured: from date of randomization up to approximately 24 months
Overall survival (OS)- Phase II
Percentage of participants who are alive or who are lost to follow-up at the analysis data cut-off
Measured: from date of randomization up to approximately 24 months
Progression free survival (PFS) -Phase III
Percentage of participants with PFS -defined as the time from date of randomization to first documented progression
Measured: from date of randomization up to approximately 24 months
Overall response rate (ORR)- Phase III
ORR is defined as the percentage of participants with best overall response (BOR) of confirmed complete response (CR) or partial response (PR)
Measured: from date of randomization up to approximately 24 months
Disease control rate (DCR) -Phase III
DCR is defined as the percentage of participants with BOR of confirmed CR, PR, stable disease (SD) or Non-CR/Non progressive disease (PD)
Measured: from date of randomization up to approximately 24 months
Duration of response (DoR)- Phase III
Percentage of participants with confirmed DoR defined as duration of time between the date of first documented response (CR or PR) and progression or death due to any cause, whichever occurs first.
Measured: from date of randomization up to approximately 24 months
Time to first radiographic soft tissue progression (TTSTP)- Phase III
Percentage of participants with confirmed first radiographic progression in soft tissue
Measured: from date of randomization up to approximately 24 months
First symptomatic skeletal event (TTSSE)_Phase III
Percentage of participants with confirmed skeletal event is defined as new symptomatic pathological bone fracture, spinal cord compression, tumor-related orthopedic surgical intervention, or requirement for radiation therapy to relieve bone pain, or death due to any cause, whichever occurs first
Measured: from date of randomization up to approximately 24 months
Prostate specific antigen (PSA) response -Phase III
PSA50 is defined as the percentage of participants who achieved a confirmed ≥ 50% decrease from baseline
Measured: from date of randomization up to approximately 24 months
Patient reported disease related symptoms and health-related quality of life (HRQoL): Phase III
Percentage of participants who had a Change from baseline on FACT-P Prostate Cancer Subscale (PCS)
Measured: from date of randomization up to approximately 24 months
Time to worsening on the Worst Pain: Phase III
Time to worsening on the Worst Pain defined as the time from randomization to the first occurrence of worsening on the Worst Pain item (brief pain inventory - short form (BPI-SF)) of at least 30% of baseline or minimum of 2 points increase from baseline, or death due to any cause, whichever occurs first. BPI-SF is a self-reported questionnaire to evaluate pain intensity (severity) and impact of pain on the participant's daily functioning (interference).
Measured: from date of randomization up to approximately 24 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted17 Jan 2025
- Study start27 Feb 2025
- Primary completion27 Jun 2028 (estimated)
- Study completion19 Jul 2033 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Prostate CancerStudies of the same condition, open and under way.
- More trials run by Novartis PharmaceuticalsThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2/3
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 443 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Novartis Pharmaceuticals
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06780670
- Sponsor's protocol ID
- CAAA817A12201
- Other IDs
- 2024-512342-42-00
- Acronym
- PSMAcTION
- Status last verified
- Sep 2026
- First submitted
- 17 Dec 2024
- Last updated
- 22 Sep 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 22 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- PSMAcTION: A Phase II/III, Open-label, International, Multicenter, Randomized Study of AAA817 Versus Standard of Care in the Treatment of Adult Participants With PSMA Positive Metastatic Castration-resistant Prostate Cancer Who Progressed on or After [177Lu]Lu-PSMA Targeted Therapy
- ClinicalTrials.gov ID
- NCT06780670
- Acronym / sponsor ID
- PSMAcTION / CAAA817A12201
- Conditions
- Prostate Cancer
- Keywords
- post [177Lu]Lu-PSMA targeted therapy, PSMA-positive, mCRPC adults, Metastatic castration-resistant prostate cancer, AAA817, [225Ac]Ac-PSMA-617, PSMA-based targeted therapy, Standard of Care
- Phase
- Phase 2/3
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 443 participants (estimated)
- Lead sponsor
- Novartis PharmaceuticalsIndustry (pharma, biotech, devices)
- Study start
- 27 Feb 2025 (actual)
- Primary completion
- 27 Jun 2028 (estimated)
- Study completion
- 19 Jul 2033 (estimated)
- First posted
- 17 Jan 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This is a Phase II/III study. Patient population is adult participants with PSMA-positive mCRPC who had treatments with androgen receptor pathway inhibitor (ARPI) and taxane-based chemotherapy and progressed on or after [177Lu]Lu-PSMA targeted therapy.
Treatment of interest: the investigational treatment is AAA817 regardless of subsequent anti-neoplastic treatment. The control treatment is investigator's choice of Standard of Care, regardless of subsequent anti-neoplastic treatment
Detailed description
Study CAAA817A12201 consists of 2 parts: a randomized, open-label, international, multicenter, phase II study (Phase II) to collect more information to support the proposed dose of AAA817 and a randomized, open-label, international, multicenter, 2- arm phase III study (Phase III) aimed to evaluate the efficacy and safety of proposed dose of AAA817 vs. investigator's choice of standard of care (SoC) in the treatment of adult participants with PSMA-positive metastatic castration-resistant prostate cancer (mCRPC) who had treatments with ARPI and taxane-based chemotherapy, and progressed on or after [177Lu]Lu-PSMA targeted therapy. The purpose of the phase II part (Phase II) of this study is to collect additional information to support proposed phase III dose of AAA817.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 4
| Arm | Type | Receives |
|---|---|---|
| Phase II: AAA817 Dose B | Experimental | Drug: AAA817AAA817 will be given for a number of cycles; a cycle = 8 weeks |
| Phase III: Investigator's choice of SoC | Active comparator | Drug: Investigators choice of SoCParticipants will be given Standard of Care (SOC) treatment per Investigator's choice. |
| Phase II: AAA817 Dose A | Experimental | Drug: AAA817AAA817 Dose A will be given for a number of cycles: a cycle = 8 weeks |
| Phase III: Recommended Phase 3 Dose of AAA817 | Experimental | Drug: AAA817Rp3D of AAA817 will be given for a number of cycles; a cycle = 8 weeks |
Who may qualify
- Ages
- 18 to 100 years
- Sex
- Male only
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (8 listed)
- adults ≥ 18 years of age.
- ECOG performance status of 0 to 2.
- histopathological and/or cytological confirmation of adenocarcinoma of the prostate.
- PSMA-positive disease as assessed by PSMA PET/CT scan using an approved PSMA imaging agent as protocol instructed,
- castrate level of serum/plasma testosterone (< 50 ng/dL or < 1.7 nmol/L).
Key exclusion criteria (8 listed)
- Any investigational agents within 28 days prior to the day of randomization.
- Any 225Ac-based investigational compound used prior to the day of randomization.
- Participants with a history of CNS metastases who are neurologically unstable, symptomatic, or receiving corticosteroids for the purpose of maintaining neurologic integrity.
- Concurrent acute kidney injury (renal failure developed between 48 hours to 7 days) or chronic kidney disease (at least 3 months of ongoing renal injury)
- Baseline xerostomia ≥ Grade 2 by CTCAE v.5
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Investigators choice of SoCThe control treatment in Phase III is investigator's choice of SoC | Drug | Phase III: Investigator's choice of SoC |
| AAA817Also: [225Ac]Ac-PSMA-617)The investigational treatment is AAA817 | Drug | Phase II: AAA817 Dose A |
| AAA817Also: [225Ac]Ac-PSMA-617)The investigational treatment is AAA817 | Drug | Phase III: Recommended Phase 3 Dose of AAA817 |
| AAA817Also: [225Ac]Ac-PSMA-617Investigational treatment is the Dose B of AAA817 | Drug | Phase II: AAA817 Dose B |
Primary outcome
Biochemical response rate (Phase II)
Time frame: from date of randomization up to approximately 24 months
Biochemical response rate as defined as the percentage of participants who achieved a ≥ 50% decrease from baseline that is confirmed by a second measurement
Adverse Events (AEs) and Serious Adverse Events (SAEs), and deaths - Phase II
Time frame: from day of randomization to 30 days after End of Treatment or (last AAA817 dose date + 55 days, last dose date of SoC + 30 days), whichever is later
Safety defined as the type, incidence and severity of AEs and SAEs, and deaths
Tolerability of the proposed dose of AAA817- Phase II
Time frame: From on-treatment period which start from the first dose of study treatment until 30 days post-last dose date for SoC and 55 days post last-dose for AAA817
Percentage of participants who experienced Dose interruptions, reductions, discontinuation, dose intensity and duration of exposure
Radiographic progression-free survival (rPFS)- Phase III
Time frame: from date of randomization up to approximately 24 months
Percentage of participants who are alive without radiographic progression or who are lost to follow-up at the time of analysis
Overall survival (OS)- Phase III
Time frame: from date of randomization up to approximately 24 months
Percentage of participants who are alive or who are lost to follow-up at the time of analysis
14 secondary outcomes
Radiographic progression-free survival (rPFS)- Phase II
Time frame: from date of randomization up to approximately 24 months
Progression free survival (PFS)- Phase II
Time frame: from date of randomization up to approximately 24 months
Overall response rate (ORR)- Phase II
Time frame: from date of randomization up to approximately 24 months
Disease control rate (DCR)- Phase II
Time frame: from date of randomization up to approximately 24 months
Overall survival (OS)- Phase II
Time frame: from date of randomization up to approximately 24 months
Progression free survival (PFS) -Phase III
Time frame: from date of randomization up to approximately 24 months
Overall response rate (ORR)- Phase III
Time frame: from date of randomization up to approximately 24 months
Disease control rate (DCR) -Phase III
Time frame: from date of randomization up to approximately 24 months
Duration of response (DoR)- Phase III
Time frame: from date of randomization up to approximately 24 months
Time to first radiographic soft tissue progression (TTSTP)- Phase III
Time frame: from date of randomization up to approximately 24 months
First symptomatic skeletal event (TTSSE)_Phase III
Time frame: from date of randomization up to approximately 24 months
Prostate specific antigen (PSA) response -Phase III
Time frame: from date of randomization up to approximately 24 months
Patient reported disease related symptoms and health-related quality of life (HRQoL): Phase III
Time frame: from date of randomization up to approximately 24 months
Time to worsening on the Worst Pain: Phase III
Time frame: from date of randomization up to approximately 24 months
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 22 Sep 2026.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Novartis Pharmaceuticals contact
93 sites in 13 countries: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2/3 study testing Investigators choice of SoC and AAA817 in people with Prostate Cancer, run by Novartis Pharmaceuticals at 93 sites in 13 countries.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 8 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 22 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 93 sites in United States, China, Japan, Israel, South Korea and 8 more countries. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this combined phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Novartis Pharmaceuticals (1-888-669-6682, novartis.email@novartis.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Biochemical response rate (Phase II) (time frame: from date of randomization up to approximately 24 months). The study lists 5 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 22 Sep 2026.